Pasadena, Los Angeles County

Room Addition Cost in Pasadena, CA

Pasadena remodeling costs are 10% abovethe California state average. Here's what a typical room addition costs in Pasadena in 2026, based on a 300 sqf project.

Budget

$66,000

$220/sqf

Mid-Range

$115,500

$385/sqf

High-End

$181,500

$605/sqf

Cost breakdown

Foundation & Framing

30%$34,650

Roofing & Exterior

15%$17,325

Mechanical (HVAC, Electrical)

15%$17,325

Interior Finishes

20%$23,100

Windows & Doors

10%$11,550

Permits & Engineering

10%$11,550

Breakdown based on mid-range estimate of $115,500

Typical Timeline

3-6 months

Permits Required

Building permit, structural engineering, possibly zoning approval.

Remodeling in Pasadena

Pasadena's historic districts have strict design review requirements that add time and cost. Craftsman home restorations are common and command premium pricing from specialized contractors.

A room addition adds square footage and value to your home. Costs depend on whether it's a simple bump-out, a second story, or a full wing addition with plumbing.

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